INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
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2020
·
IF 3.573
Xiaotong Wang,Yaxin Liu,Ming Zhang,Zhuo Luo,Dongzhi Yang
The development of switchable wettability membranes with high permeation fluxes is crucial for oily sewage treatment. A hierarchical beadlike porous PS fibrous membrane with pH-switchable wettability was precisely fabricated by nonsolvent-induced phase separation during electrospinning, followed by UV photografting copolymers of 2-(dimethylamino) ethyl acrylate (DMAEA) and 3,3,4,4,5,5,6,6,7,7,8,8,8-tridecafluorooctyl acrylate (TFOA). The designed unique structure notably increases the roughness of surface and enhances superwettability. Protonation of the amine groups on the fibers triggered by an acid solution (pH < 2) induces underwater superoleophobicity, which in turn causes superoleophilicity in a neutral or basic solution. The as-prepared fibrous membrane can effectively separate the hexane/water mixture with an oil flux of 10 186.8 L m–2 h–1 and a separation efficiency of 99.2% only driven by gravity. Especially, excellent separation performances (water fluxes) were also realized for other oil/water mixtures with higher viscosity by switching the wettability from superoleophilicity to hydrophilicity. Moreover, the as-prepared fibrous membrane can also be applied to a continuous T-shaped tube device delivering a high handling capacity of 6631.5 L m–2 h–1, which provides the oily sewage treatment with a facile strategy in practical application.
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高影响因子
Journal of Materials Chemistry A
·
2020
·Vol. 8
·期 8
·4505-4514
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IF 11.301
Qianqian Yu,Xinda You,Hong Wu,Yanlei Su,Runnan Zhang,Yanan Liu,Chao Yang,Jianliang Shen,Jinqiu Yuan,Zhongyi Jiang
Amphiphobic fluorine materials hold great promise for fabricating self-cleaning membranes. However, the severely impeded water transport in hydrophobic fluorine-based membranes and the weak interaction with the substrate of the low-surface-energy fluorine materials represent two major obstacles for efficient water purification. Herein, we design an ultrathin fluorine-based membrane via coordination-driven metal-bridging assembly. An Fe3+-rich metal–organic layer is constructed on a porous substrate by coordination between polyphosphate ligands and Fe3+ ions, accompanied by the assembly of perfluorosulfonate polymer ligands (Nafion®) via the bridging effect of Fe3+ ions for the metal-bridging fluorine-based membrane (MBFM). By virtue of the flexible modulation of Fe3+ and unique self-assembly of Nafion®, a defect-free 58 nm-thick MBFM featuring an ultrahigh surface fluorine content (47.6 at%) and underwater superoleophobicity (∼160°) is achieved, which displays a superior water permeance of 125.2 L m−2 h−1 bar−1 (2–10 times higher than that of state-of-the-art membranes with dye rejections above 90%) and versatile resistance towards both spreading and non-spreading foulants (flux decline ratios below 8%). This metal-bridging assembly strategy may shed light on advanced membrane fabrication from rationally designed ligands and functional moieties.
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高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
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2020
·Vol. 137
·期 35
·49032
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IF 2.52
Yupei Xian,Yonggang Shui,Meimei Li,Cunbao Pei,Qiyi Zhang,Yongyi Yao
Plenty of oily wastewater discharged from industrial and domestic sewage has deteriorated the environment severely, so stimuli-responsive membranes with switchable wettability have been of considerable attraction for its potential application in oil/water separation. In this work, a novel pH-dependent thermoresponsive membrane fabricated by grafting the poly[2-(diethylamino)ethyl acrylamide] (PDEAEAM) from the poly(vinylidene fluoride) (PVDF) membrane via surface-initiated atom transfer radical polymerization is explored to achieve the oil/water separation. The PDEAEAM- g -PVDF membrane shows hydrophilicity at room temperature under neutral condition while hydrophobicity at 50°C under alkaline condition. Wettability of the membrane at different temperatures is dominated by the lower critical solution temperature (LCST) of PDEAEAM, and the LCST of PDEAEAM is pH dependent. Due to the LCST of PDEAEAM, the membrane shows a variation of separation efficiency for separating hexadecane/water emulsion with temperature and pH. Typical separation efficiencies are 97.10% at 25°C under neutral condition and 30.26% at 50°C under alkaline condition.
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高影响因子
LANGMUIR
·
2020
·
IF 3.557
Li-Jun Xu,Xuan-Yu Shi,Meng-Ying Chai,Jian Ji,Zhi-Kang Xu,Ling-Shu Wan
Porous materials have attracted great interest in recent years, and a variety of surface modification methods have been developed to endow porous materials with multifunctional applications. Herein, multifunctional porous materials are fabricated based on surface metallization. Metallized sponges with Ag and Cu are highly hydrophobic and are still hydrophobic under oil. The metallized sponges selectively adsorb oils from oil/water mixtures and can completely remove oils from water. We further demonstrate continuous oil–water separation by the metallized sponges with the aid of a peristaltic pump. The Ag-metallized materials show high catalytic performance for both chemical reduction and dye degradation. The catalytic reduction efficiency of 4-nitrophenol reaches 97.7% within 60 min and remains as high as 96% after 15 cycles. Moreover, the metallized materials show 99.99% bactericidal efficiency for both Staphylococcus aureus and Escherichia coli. Particularly, the Cu-metallized materials exhibit stable conductivity under deformation; and metal patterns are realized via the metallization method combined with a patterned mask, which may provide a feasible approach for flexible electronics. This work provides a versatile method to introduce metal coatings to porous materials, broadening the applications of porous materials.
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PubMed
高影响因子
JOURNAL OF MEMBRANE SCIENCE
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2020
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IF 7.183
Ze Kun Sun,Yuxin Zhou,Yang Jiao,Xi Quan Cheng,Yingjie Zhang,Peng Wang,Heng Liang,Xiaobin Yang,Enrico Drioli,Alberto Figoli,Jun Ma,Lu Shao
Membrane technology is believed as a cost-effective approach for solving the water issues, where as it suffers from serious membrane fouling . Surface grafting and surface coating have been proved to be effective in abating the membrane fouling; however, these processes always need additional procedures and compromise the initial permeance of the membranes. Herein, we developed a kind of highly permeable polyacrylonitrile (PAN) membranes with excellent anti-fouling performance through one-step phase inversion of the PAN casting solution containing water-soluble active additives. During the process, the water-soluble active additives could segregate towards the membrane surface and pore walls; thereby finely tailoring the pore structures of the PAN-based membranes. Moreover, the active additives could react with each other to form crosslinked networks containing multi-hydrophilic functional groups including CH 2 –O–CH 2 , –OH or -Si-OH. Consequently, the PAN-based membranes exhibited surprising superhydrophilicity with water contact angle below 10° even after soaking in water for one week and the anti-fouling permeance of the membranes increased significantly with permeance recovery rate above 93%. Interestingly, the modified membranes also demonstrated both high permeances and high separation efficiency, thereby showing strong promise in water environmental remediation including wastewater treatment and oil/water emulsion separation.
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高影响因子
Bioactive Materials
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2020
·
IF 8.724
Tao Wu,Jing Sun,Lei Tan,Qi Yan,Lei Li,Liangwen Chen,Xiangmei Liu,Shi Bin
Postmenopausal osteoporosis is a common chronic dynamic bone disorder, caused by estrogen deficiency. To address this issue, we constructed a controlled drug-release system composed of poly (N-isopropylacrylamide) brush modified mesoporous hydroxyapatite (MHA-SIM-P) loaded with simvastatin (SIM) using an ovariectomised (OVX) rat model. Quantitative alkaline phosphatase activity assay, alizarin red staining and RT-PCR were tested to evaluate the osteogenic ability in vitro . The results showed that the MHA-SIM-P nanoparticles significantly improved the osteogenic differentiation of OVX bone marrow stromal cells (BMSCs) in vitro . In osteoporotic animal model, the therapeutic efficiency for bone defect was evaluated by μCT analysis, tartrate-resistant acid phosphatase, haematoxylin and eosin staining, which showed improved bone formation and less osteoclastic response in OVX rats after surgery for 3 and 6 weeks. This polymer brush modified MHA system provided a sustained release system of hydrophobic SIM to inhibit osteoporosis together with MHA nanoparticle promoting the osteogenesis. Thus, this novel strategy exhibited great potential for promoting osteogenic ability and treating local osteoporotic defects.
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PubMed
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
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2020
·
IF 3.573
Mingbo Shi,Daiwu Lin,Renliang Huang,Wei Qi,Rongxin Su,Zhimin He
The treatment of multicontaminant wastewater has attracted extensive attention in recent years. Herein, we synthesized a porous and hydrophobic composite (Zr-MOF-SH/MF) via the in situ growth of mercapto-functionalized Zr-metal–organic frameworks (MOFs) (Zr-MOF-SH) on the surface of a melamine formaldehyde (MF) sponge. The successful growth of hydrophobic Zr-MOF-SH, as confirmed by SEM, XRD, and XPS analysis, made the MF sponge become hydrophobic with a water contact angle of 125°. The adsorption capacity of the Zr-MOF-SH/MF composite for dichloromethane can reach up to 113 g/g. Moreover, the composite can efficiently and selectively remove Hg2+ ions from water. Especially, PCN-224-MAA/MF had an adsorption capacity of 412.5 mg/g for Hg2+ ions. The removal efficiency of Hg2+ ions increased as the oil content in the oil–water mixture increased. In addition, PCN-224-MAA/MF can be recovered and reused five times with only a slight decrease in adsorption capacity. This study provides a promising strategy for the synthesis of a dual-functional composite that exhibits excellent performance in removing oil and heavy metal ions simultaneously from water.
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高影响因子
EUROPEAN JOURNAL OF PHARMACOLOGY
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2020
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IF 3.263
Zi-Yuan Wang,Zheng-Meng Jiang,Ping-Ting Xiao,Ying-Qun Jiang,Wen-Jin Liu,E-Hu Liu
Obesity is one of the main causes of human cardiovascular and cerebrovascular diseases . Baicalin , a bioactive flavonoid isolated from the herbal medicine Scutellaria baicalensis Georgi, is reported to ameliorate obesity and hyperlipidemia . However, its mechanism remains unclear. Here, we used network pharmacology to explore the potential mechanism of baicalin on a system level. First, we predicted the targets of baicalin and diseases, and then protein-protein interaction (PPI) networks were constructed. Moreover, Kyoto Encyclopedia of Genes and Genomes (KEGG) pathway enrichment was performed via the Database for Annotation, Visualization, and Integrated Discovery (DAVID) server. Lastly, we confirmed the results of the network analysis by palmitic acid (PA) treated human hepatoma cells (HepG2) in vitro . The results indicated that 37 targets related to obesity treated by baicalin were predicted by network pharmacology, and top 10 related pathways were extracted by the KEGG database. Baicalin treatment could reduce triglyceride (TG) contents and lipid droplet accumulation in PA-treated HepG2 cells. The anti-obesity effects of baicalin might be due to the up-regulation of solute carrier family 2 member 1 (SLC2A1) and down-regulation of tumor necrosis factor (TNF), nuclear factor kappa B subunit 1 (NFKB1), sterol regulatory element binding transcription factor 1 (SREBF1), peroxisome proliferator activated receptor gamma and caspase 3 (CASP3). Our results indicated that baicalin may regulate key inflammatory markers, adipogenesis process, and apoptosis for treatment of obesity.
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PubMed
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2020
·
IF 7.489
Zhipeng Yang,Hongqiang Li,Lin Zhang,Xuejun Lai,Xingrong Zeng
Highly stretchable and self-healable elastomers are attractive for a variety of applications in the fields of electrical skin and wearable devices. Herein, we proposed a simple one-pot two-step approach to synthesize room-temperature self-healable polydimethylsiloxane (PDMS) elastomers. Excess aminopropyl terminated polydimethylsiloxane was firstly reacted with isophorone diisocyanate to synthesize amino-terminated PDMS with incorporated ureido groups, followed by further reaction with terephthalaldehyde as chain extender to yield self-healing PDMS elastomers. The obtained elastomer exhibited high stretchability of 1670% and transmittance of 92%. Owing to the dynamic intermolecular hydrogen bonds, reversible imine bonds and highly flexible Si O chains, the elastomer showed excellent self-healing capability with a healing efficiency of 95% after healing at room temperature for 24 h. Even in water and artificial sweat, the healing efficiencies also reached 89% and 78%, respectively. In addition, the elastomer supported triple-layer bending sensor was fabricated with a sandwiched hydroxylated multiwalled carbon nanotubes (MWCNTs-OH) film and successfully applied for detecting human motions. Interestingly, the cut sensor was able to be recovered for working after being irradiated under sunlight for only 10 min. Our method to synthesize highly stretchable, transparent and self-healing elastomers is simple and the reaction can be carried out at room temperature, which is beneficial for the large-scale production and the further practical application in functional electronics.
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PubMed
高影响因子
LANGMUIR
·
2020
·
IF 3.557
Xiaoxu Dong,Mei Cui,Renliang Huang,Rongxin Su,Wei Qi,Zhimin He
A superhydrophobic and superoleophilic porous composite was successfully prepared via a polydopamine-assisted surface coating of MIL-53(Fe) and 1-dodecanethiol (DDT) on a melamine formaldehyde (MF) sponge. The as-prepared sponge composite (MIL-DDT@MF) has a high water contact angle (WCA) of 151.8°, which is probably attributed to both the rough surface derived from in situ growth of MIL-53 nanocrystals and the low surface energy due to grafting of hydrophobic 1-dodecanethiol. The MIL-DDT@MF sponge can effectively absorb oil or organic solvent with an absorption capacity of up to 54.1 (for petroleum) to 120.2 (for chloroform) times its own weight. In addition, the MIL-DDT@MF sponge retained a high absorption capacity and maintained approximately 78% of its original value after 50 cycles of reuse. Moreover, the MIL-DDT@MF sponge can selectively absorb the oil/organic solvent from water and achieve continuous oil–water separation. The separation efficiency of n-hexane, dichloromethane, and crude oil from water or seawater can reach above 95%. The superhydrophobic and superoleophilic MIL-DDT@MF sponge has potential as a promising absorbent for treatment of oily wastewater.
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高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2021
·Vol. 138
·期 47
·51416
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IF 3.125
Wen Ou,Xinjie Luo,Yujun Feng
Polymer or polymer gels have been widely used to control excessive water during oil production by homogenizing injection profile and reducing water cut in the produced fluids. However, the gels used are generally unable to selectively minimize water production, and face the challenge of syneresis of gels under high temperature and high salinity environment. In this work, melamine-formaldehyde sponge was modified with AlCl 3 solution, rendering a transition from hydrophilic to hydrophobic state with a water contact angle of 130° on the surface of the modified product. Filtration results show that mineral oil and water can be selectively separated with the hydrophobically modified sponge powders. Simulated water shutoff experiments demonstrated the blockage efficiency against water was 30% higher than that against oil, and the oil production was increased 7.4% after blocking. The parallel profile control tests confirmed that the fraction flow of high permeable channel decreased about 75%, accompanied with 60% rise of oil recovery factor. These results indicated that such hydrophobic materials can significantly reduce excessive water production, and this work provided a new idea to offer a low-cost hydrophobic material for conformance control and water shutoff during oil production.
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高影响因子
JOURNAL OF MATERIALS SCIENCE
·
2021
·Vol. 56
·期 34
·19075-19092
·
IF 4.22
Liu Ying,Huang Yanhui,Huang Quanfei,Li Fan,Liu Xianmiao
Due to frequent industrial wastewater discharge and oil spills, there is a need to develop sustainable and efficient absorbents and treatment methods. Herein, based on the unique microstructure of wood and functional requirements, super-hydrophobic, recyclable, and renewable wood sponges (SHWSs) with an ultralight density (35.4 mg cm −3 ) and high porosity (98.68%) were prepared from anisotropic natural balsa wood via a scalable and sustainable silanization reaction using liquid-phase deposition (LPD). The super-hydrophobicity of the SHWSs (contact angle = 159.2°) was due to the formation of polysiloxanes on the surface via silanization. The internal contact angle (CA) reached 137.2°, which was attributed to the uniformity of LPD. The SHWSs exhibited a high absorption capacity for various organic solvents and oils (23–60 g g −1 ) and reusability, allowing it to reach a contact angle of 150.8° and an absorption capacity of 52 g g −1 for CCl 4 after 50 absorption cycles. The SHWSs also showed excellent super-hydrophobicity under acidic, alkaline, and saline conditions, as well as in hot water, demonstrating their excellent durability. A continuous oil/water separation device was made by using the SHWSs, which showed a high separation efficiency, with a flux rate of up to 72.8 L h −1 g −1 . This green strategy for treating natural balsa wood with LPD provides a scalable way to produce sustainable oil/water separation materials while also developing high-value-added applications of natural balsa wood.
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高影响因子
危险品化学品经营许可证（带存储）